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const and static functions for epa

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This commit is contained in:
Henry Gabryjelski 2023-08-08 23:38:26 -07:00
parent 0af484fdee
commit 63a457c27f
2 changed files with 31 additions and 31 deletions
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38
armsrc/epa.c
View file

@ -37,6 +37,24 @@
static const uint8_t pps[] = {0xD0, 0x11, 0x00, 0x52, 0xA6};
#endif
// this struct is used by EPA_Parse_CardAccess and contains info about the
// PACE protocol supported by the chip
typedef struct {
uint8_t oid[10];
uint8_t version;
uint8_t parameter_id;
} pace_version_info_t;
// general functions
static void EPA_Finish(void);
static size_t EPA_Parse_CardAccess(const uint8_t *data, size_t length, pace_version_info_t *pace_info);
static int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length);
static int EPA_Setup(void);
// PACE related functions
static int EPA_PACE_MSE_Set_AT(const pace_version_info_t pace_version_info, uint8_t password);
static int EPA_PACE_Get_Nonce(uint8_t requested_length, uint8_t *nonce);
// APDUs for communication with German Identification Card
// General Authenticate (request encrypted nonce) WITHOUT the Le at the end
@ -153,7 +171,7 @@ static int EPA_APDU(uint8_t *apdu, size_t length, uint8_t *response, uint16_t re
//-----------------------------------------------------------------------------
// Closes the communication channel and turns off the field
//-----------------------------------------------------------------------------
void EPA_Finish(void) {
static void EPA_Finish(void) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
iso_type = 0;
@ -172,7 +190,7 @@ void EPA_Finish(void) {
// TODO: Support elements with long tags (tag is longer than 1 byte)
// TODO: Support proprietary PACE domain parameters
//-----------------------------------------------------------------------------
size_t EPA_Parse_CardAccess(uint8_t *data, size_t length, pace_version_info_t *pace_info) {
static size_t EPA_Parse_CardAccess(const uint8_t *data, size_t length, pace_version_info_t *pace_info) {
size_t index = 0;
@ -243,7 +261,7 @@ size_t EPA_Parse_CardAccess(uint8_t *data, size_t length, pace_version_info_t *p
// Returns -1 on failure or the length of the data on success
// TODO: for the moment this sends only 1 APDU regardless of the requested length
//-----------------------------------------------------------------------------
int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length) {
static int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length) {
// the response APDU of the card
// since the card doesn't always care for the expected length we send it,
// we reserve 262 bytes here just to be safe (256-byte APDU + SW + ISO frame)
@ -300,7 +318,7 @@ static void EPA_PACE_Collect_Nonce_Abort(uint32_t cmd, uint8_t step, int func_re
//-----------------------------------------------------------------------------
// Acquire one encrypted PACE nonce
//-----------------------------------------------------------------------------
void EPA_PACE_Collect_Nonce(PacketCommandNG *c) {
void EPA_PACE_Collect_Nonce(const PacketCommandNG *c) {
/*
* ack layout:
* arg:
@ -354,7 +372,7 @@ void EPA_PACE_Collect_Nonce(PacketCommandNG *c) {
struct p {
uint32_t m;
} PACKED;
struct p *packet = (struct p *)c->data.asBytes;
const struct p *packet = (const struct p *)c->data.asBytes;
func_return = EPA_PACE_Get_Nonce(packet->m, nonce);
// check if the command succeeded
@ -377,7 +395,7 @@ void EPA_PACE_Collect_Nonce(PacketCommandNG *c) {
// Returns the actual size of the nonce on success or a less-than-zero error
// code on failure.
//-----------------------------------------------------------------------------
int EPA_PACE_Get_Nonce(uint8_t requested_length, uint8_t *nonce) {
static int EPA_PACE_Get_Nonce(uint8_t requested_length, uint8_t *nonce) {
// build the APDU
uint8_t apdu[sizeof(apdu_general_authenticate_pace_get_nonce) + 1];
@ -416,7 +434,7 @@ int EPA_PACE_Get_Nonce(uint8_t requested_length, uint8_t *nonce) {
// Initializes the PACE protocol by performing the "MSE: Set AT" step
// Returns 0 on success or a non-zero error code on failure
//-----------------------------------------------------------------------------
int EPA_PACE_MSE_Set_AT(pace_version_info_t pace_version_info, uint8_t password) {
static int EPA_PACE_MSE_Set_AT(const pace_version_info_t pace_version_info, uint8_t password) {
// create the MSE: Set AT APDU
uint8_t apdu[23];
@ -479,7 +497,7 @@ int EPA_PACE_MSE_Set_AT(pace_version_info_t pace_version_info, uint8_t password)
//-----------------------------------------------------------------------------
// Perform the PACE protocol by replaying given APDUs
//-----------------------------------------------------------------------------
void EPA_PACE_Replay(PacketCommandNG *c) {
void EPA_PACE_Replay(const PacketCommandNG *c) {
uint32_t timings[ARRAYLEN(apdu_lengths_replay)] = {0};
@ -547,7 +565,7 @@ void EPA_PACE_Replay(PacketCommandNG *c) {
// Set up a communication channel (Card Select, PPS)
// Returns 0 on success or a non-zero error code on failure
//-----------------------------------------------------------------------------
int EPA_Setup(void) {
static int EPA_Setup(void) {
#ifdef WITH_ISO14443a
{
@ -593,7 +611,7 @@ int EPA_Setup(void) {
return 1;
}
void EPA_PACE_Simulate(PacketCommandNG *c) {
void EPA_PACE_Simulate(const PacketCommandNG *c) {
//---------Initializing---------

24
armsrc/epa.h
View file

@ -22,26 +22,8 @@
#include "common.h"
#include "pm3_cmd.h"
// this struct is used by EPA_Parse_CardAccess and contains info about the
// PACE protocol supported by the chip
typedef struct {
uint8_t oid[10];
uint8_t version;
uint8_t parameter_id;
} pace_version_info_t;
// general functions
void EPA_Finish(void);
size_t EPA_Parse_CardAccess(uint8_t *data, size_t length, pace_version_info_t *pace_info);
int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length);
int EPA_Setup(void);
// PACE related functions
int EPA_PACE_MSE_Set_AT(pace_version_info_t pace_version_info, uint8_t password);
int EPA_PACE_Get_Nonce(uint8_t requested_length, uint8_t *nonce);
void EPA_PACE_Collect_Nonce(PacketCommandNG *c);
void EPA_PACE_Replay(PacketCommandNG *c);
void EPA_PACE_Simulate(PacketCommandNG *c);
void EPA_PACE_Collect_Nonce(const PacketCommandNG *c);
void EPA_PACE_Replay(const PacketCommandNG *c);
void EPA_PACE_Simulate(const PacketCommandNG *c);
#endif /* __EPA_H */